Just a heads up for those of you wanting to run a Tial BOV on the SOS setup. I recently had one welded on my aftercooler due to issues I was having with the Bosch valve on high boost. After I picked my car up I put in the good gas, and swapped pulleys. When I pulled out onto the road I rolled into the throttle, and ran it through the gears. When I let off I could smell radiator fluid badly. Thinking it was just coming from excess that was drained from the little I keep in my aftercooler I disregarded it. After the second pull it smelled worse and I knew something was up. Luckily I was just down the road, so I ran back to my house, and popped the hood. The radiator was leaking badly behind the fan shroud. I assumed nothing and ordered a new radiator, but upon removing that one we noticed something interesting. The fan contacted the radiator and ripped it wide open directly in front of the Tial BOV. We then realized that the release at high boost caused the fan to contact the radiator. We tested it by reving the car and found the fan did give when it blew off. So we came up with this below to prevent it from happening again, not the most beautiful piece, but I will clean it up when I have time. Just wanted to give all of you a heads up, and try to save you some coin.

 

Dynamic clearance is something we often overlook. I recently removed the my AC fan and repositioned the SPAL fan in the middle of the radiator. Works like a champ I don't see why we need that small fan there with an aftermarket radiator. You can use that space better for the BOV.

 

Yea I first considered removing the fan on that side, but decided against it. The Texas weather is damn hot at times, and I do not want to risk it.

 

Does the tial pull vacuum on idle? When I was supercharged(SOS kit) I had a filter on my synapse to prevent sh1t unfiltered entering the engine..

 

At idle (vacuum) the Tial is held open allowing all the compressed air to escape. There's no way in hell unfiltered air can enter the intake path. The vacuum is on the other side of the throttle plate not before it.

 

Correct. You have to get the 3psi(Supercharger Only) spring in the Tial for it to function properly. It stays open at idle, and cruising. It can get a little loud, especially on a cold start.

 

just curious , whats high boost? Im running the 3.4" pulley (13psi@8k, 15psi@8.5k) still on the Bosch diverter valve with no issues

 

I am running a 3" pulley and boost is right at 20psi at redline. The Bosch could not release the boost quick enough when the throttle plate would close. Noticed it on the dyno when it blew the aftercooler off of the throttle body after the pull was complete and we were off the gas. After the first time we, watched it during the second and third pull and when we hit the limiter and let off, you could watch the aftercooler push out of the coupler. We pulled off the aftercooler and beaded the pipes to prevent it, but you could still notice the system pressuring. After installing the Tial, it blew my mind how much pressure is actually being released. I probably could have continued to run the Bosch, but I wanted to eliminate any weak points in the system.

 

I have this setup however I mounted mine with a 90 degree adapter no problems

 

any pic??? did you weld it on as well????